CA2048759A1 - Method and apparatus for defeating the operation of an ic built-in noise inverter - Google Patents
Method and apparatus for defeating the operation of an ic built-in noise inverterInfo
- Publication number
- CA2048759A1 CA2048759A1 CA2048759A CA2048759A CA2048759A1 CA 2048759 A1 CA2048759 A1 CA 2048759A1 CA 2048759 A CA2048759 A CA 2048759A CA 2048759 A CA2048759 A CA 2048759A CA 2048759 A1 CA2048759 A1 CA 2048759A1
- Authority
- CA
- Canada
- Prior art keywords
- noise inverter
- defeating
- noise
- inverter
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/10—Adaptations for transmission by electrical cable
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/16—Analogue secrecy systems; Analogue subscription systems
- H04N7/167—Systems rendering the television signal unintelligible and subsequently intelligible
- H04N7/171—Systems operating in the amplitude domain of the television signal
- H04N7/1713—Systems operating in the amplitude domain of the television signal by modifying synchronisation signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/52—Automatic gain control
- H04N5/53—Keyed automatic gain control
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Control Of Amplification And Gain Control (AREA)
- Picture Signal Circuits (AREA)
- Circuits Of Receivers In General (AREA)
- Television Receiver Circuits (AREA)
Abstract
Apparatus for defeating a noise inverter disposed within the IC includes circuitry for changing the amplitude of the AGC signal applied to an AGC amplifier prior to the noise inverter so as to lower the level of the signal fed to the noise inverter. As a result, the signal fed to the noise inverter is less than the threshold signal level necessary for operation of the noise inverter. This enables use of an EIA multiport standard decoder with a standard television signal processing IC
wherein the noise inverter is not directly accessible for defeating it.
wherein the noise inverter is not directly accessible for defeating it.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US592,047 | 1990-10-04 | ||
US07/592,047 US5133009A (en) | 1990-10-04 | 1990-10-04 | Method and apparatus for defeating the operation of an ic built-in noise inverter |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2048759A1 true CA2048759A1 (en) | 1992-04-05 |
CA2048759C CA2048759C (en) | 1996-12-31 |
Family
ID=24369058
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002048759A Expired - Fee Related CA2048759C (en) | 1990-10-04 | 1991-08-08 | Method and apparatus for defeating the operation of an ic built-in noise inverter |
Country Status (9)
Country | Link |
---|---|
US (1) | US5133009A (en) |
EP (1) | EP0479224B1 (en) |
JP (1) | JP3134165B2 (en) |
KR (1) | KR100243448B1 (en) |
CN (1) | CN1030812C (en) |
CA (1) | CA2048759C (en) |
DE (2) | DE69124048D1 (en) |
ES (1) | ES2097777T4 (en) |
MY (1) | MY107620A (en) |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5249228A (en) * | 1992-06-22 | 1993-09-28 | Rca Thomson Licensing Corporation | Cable television signal scrambling system |
US5812665A (en) * | 1995-06-08 | 1998-09-22 | Ictv, Inc. | Switched channel system |
JP2000307972A (en) * | 1999-04-26 | 2000-11-02 | Mitsubishi Electric Corp | Semiconductor integrated circuit |
JP2002026750A (en) * | 2000-07-07 | 2002-01-25 | Pioneer Electronic Corp | Receiver |
US7256645B2 (en) * | 2002-11-28 | 2007-08-14 | Nxp B.V. | Suppression of noise in an integrated circuit |
US8074248B2 (en) | 2005-07-26 | 2011-12-06 | Activevideo Networks, Inc. | System and method for providing video content associated with a source image to a television in a communication network |
WO2008088741A2 (en) | 2007-01-12 | 2008-07-24 | Ictv, Inc. | Interactive encoded content system including object models for viewing on a remote device |
US9826197B2 (en) | 2007-01-12 | 2017-11-21 | Activevideo Networks, Inc. | Providing television broadcasts over a managed network and interactive content over an unmanaged network to a client device |
CN101917561B (en) * | 2010-07-14 | 2012-11-14 | 深圳创维-Rgb电子有限公司 | Method for processing TV nonstandard signal |
AU2011315950B2 (en) | 2010-10-14 | 2015-09-03 | Activevideo Networks, Inc. | Streaming digital video between video devices using a cable television system |
EP2695388B1 (en) | 2011-04-07 | 2017-06-07 | ActiveVideo Networks, Inc. | Reduction of latency in video distribution networks using adaptive bit rates |
US10409445B2 (en) | 2012-01-09 | 2019-09-10 | Activevideo Networks, Inc. | Rendering of an interactive lean-backward user interface on a television |
US9800945B2 (en) | 2012-04-03 | 2017-10-24 | Activevideo Networks, Inc. | Class-based intelligent multiplexing over unmanaged networks |
US9123084B2 (en) | 2012-04-12 | 2015-09-01 | Activevideo Networks, Inc. | Graphical application integration with MPEG objects |
US10275128B2 (en) | 2013-03-15 | 2019-04-30 | Activevideo Networks, Inc. | Multiple-mode system and method for providing user selectable video content |
US9219922B2 (en) | 2013-06-06 | 2015-12-22 | Activevideo Networks, Inc. | System and method for exploiting scene graph information in construction of an encoded video sequence |
EP3005712A1 (en) | 2013-06-06 | 2016-04-13 | ActiveVideo Networks, Inc. | Overlay rendering of user interface onto source video |
US9294785B2 (en) | 2013-06-06 | 2016-03-22 | Activevideo Networks, Inc. | System and method for exploiting scene graph information in construction of an encoded video sequence |
US9788029B2 (en) | 2014-04-25 | 2017-10-10 | Activevideo Networks, Inc. | Intelligent multiplexing using class-based, multi-dimensioned decision logic for managed networks |
CN109525202B (en) * | 2018-11-30 | 2022-09-23 | 国网河南省电力公司信息通信公司 | Big data-based power grid safety management information system |
KR102143205B1 (en) | 2019-05-23 | 2020-08-10 | 신라에스지 주식회사 | Source compactor with compressed discharge structure paving source |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3555182A (en) * | 1968-05-20 | 1971-01-12 | Rca Corp | Plural operating mode automatic gain control system |
US3582551A (en) * | 1968-09-06 | 1971-06-01 | Zenith Radio Corp | Television receiver noise immune automatic gain control and sync separator control system |
US3898380A (en) * | 1973-10-17 | 1975-08-05 | Motorola Inc | AGC Detector circuit having noise and overload correction capability |
JPS5744380A (en) * | 1980-08-29 | 1982-03-12 | Hitachi Ltd | Television picture receiver |
US4706285A (en) * | 1985-12-24 | 1987-11-10 | Rca Corporation | Automatic gain control of a scrambled video signal |
US4670904A (en) * | 1986-01-15 | 1987-06-02 | Rca Corporation | System for processing a scrambled video signal |
JPS62264778A (en) * | 1986-05-12 | 1987-11-17 | Toshiba Corp | Agc circuit |
-
1990
- 1990-10-04 US US07/592,047 patent/US5133009A/en not_active Expired - Lifetime
-
1991
- 1991-07-02 MY MYPI91001203A patent/MY107620A/en unknown
- 1991-08-08 CA CA002048759A patent/CA2048759C/en not_active Expired - Fee Related
- 1991-09-29 CN CN91109440A patent/CN1030812C/en not_active Expired - Fee Related
- 1991-10-01 DE DE69124048A patent/DE69124048D1/en not_active Expired - Lifetime
- 1991-10-01 DE DE69124048T patent/DE69124048T4/en not_active Expired - Lifetime
- 1991-10-01 EP EP91116746A patent/EP0479224B1/en not_active Expired - Lifetime
- 1991-10-01 ES ES91116746T patent/ES2097777T4/en not_active Expired - Lifetime
- 1991-10-03 JP JP03322275A patent/JP3134165B2/en not_active Expired - Fee Related
- 1991-10-04 KR KR1019910017454A patent/KR100243448B1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
ES2097777T3 (en) | 1997-04-16 |
EP0479224A2 (en) | 1992-04-08 |
DE69124048T4 (en) | 1998-06-04 |
MY107620A (en) | 1996-05-15 |
CA2048759C (en) | 1996-12-31 |
KR920009223A (en) | 1992-05-28 |
EP0479224B1 (en) | 1997-01-08 |
CN1060566A (en) | 1992-04-22 |
DE69124048T2 (en) | 1997-06-12 |
US5133009A (en) | 1992-07-21 |
JP3134165B2 (en) | 2001-02-13 |
CN1030812C (en) | 1996-01-24 |
DE69124048D1 (en) | 1997-02-20 |
ES2097777T4 (en) | 1998-03-16 |
EP0479224A3 (en) | 1992-07-29 |
KR100243448B1 (en) | 2000-02-01 |
JPH04271694A (en) | 1992-09-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed | ||
MKLA | Lapsed |
Effective date: 20090810 |